Deploy failed action on PR from a forked repository

[marcalexiei]

I'm opening an issue to avoid posting off topic content on #17 and because I have the same error on #18

Regarding #17 (review)

Deploy to Firebase Hosting on PR workflow failed with an error:

Input required and not supplied: firebaseServiceAccount

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I think the error cause is that Github does not provide secrets when a PR is opened from a forked repository:

If you go on https://github.com/OWNER/REPO/settings/secrets/actions
On the second paragraph it says:

Anyone with collaborator access to this repository can use these secrets and variables for actions.
They are not passed to workflows that are triggered by a pull request from a fork.

There is also a opened issue about this problem on Firebase action-hosting-deploy repository:
FirebaseExtended/action-hosting-deploy#337

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Right now I'm unable to find an alternative solution 😫

[marcalexiei]

Maybe restore the check removed in #14 could be a temporary workaround.
At least the deploy is available if the PR is coming from this repo 😅